21861008

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{463}}^1$

素因数の和:711

約数の個数: 40

約数和(自身を含む): 45913728

約数和(自身を除く): 24052720

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 227, 454, 463, 908, 926, 1816, 1852, 2951, 3632, 3704, 5902, 6019, 7408, 11804, 12038, 23608, 24076, 47216, 48152, 96304, 105101, 210202, 420404, 840808, 1366313, 1681616, 2732626, 5465252, 10930504, 21861008]

約数ペア:

[(1, 21861008), (2, 10930504), (4, 5465252), (8, 2732626), (13, 1681616), (16, 1366313), (26, 840808), (52, 420404), (104, 210202), (208, 105101), (227, 96304), (454, 48152), (463, 47216), (908, 24076), (926, 23608), (1816, 12038), (1852, 11804), (2951, 7408), (3632, 6019), (3704, 5902)]